An independent traffic study for Marina del Rey commissioned by a local group has contested the results of a study conducted by Raju Associates, a consultant for Los Angeles County.

We ARE Marina del Rey co-directors David Barish and Nancy Vernon Marino hired Tom Brohard of Tom Brohard and Associates, a professional traffic engineer and transportation planner, to review a 2010 traffic study for the county Department of Beaches and Harbors. The county study was performed to identify local and regional traffic impacts resulting from redevelopment plans for Marina del Rey.

Brohard’s report claims, “The 2010 Draft Traffic Study fails to properly identify, analyze, and mitigate all of the significant traffic impacts that will result from the proposed project, the Local Coastal Program Amendment (LCPA).”

Marino said her group hired an expert because they believed the county was misleading the public about the true traffic impacts associated with Marina projects. “But we did not realize how bad it really was,” she said. “Our calculations reveal that proposed traffic trips are underestimated by 85 percent.”

The traffic consultant for Beaches and Harbors is reviewing Brohard’s study and will provide a response by the end of the month, according to county officials.

Brohard said that based on his review of the county’s traffic study and other documents, there are other issues and concerns that require further study.

A few of these concerns include:

Baseline traffic counts have different peak hour times counted between the county’s current traffic study and its 1991 study at Washington and Lincoln boulevards;

Seasonal adjustments were omitted at Washington Boulevard and Palawan Way;

Analysis of major access was omitted;

Growth rates do not match peak hour decreases between the county’s recent study and the 1991 study;

Vehicle trip generation for related projects hasn’t been disclosed;

Some trip generation rates are either outdated or incorrect – trip generation rates developed in 1991 for the Marina were used to forecast trips to and from proposed projects in the Marina in 2020.

In the traffic engineering profession, Brohard said it is extremely rare to look back at 20-year-old traffic studies when evaluating a new project. Many of the favorable comparisons noted in the 2010 Draft Traffic Study are the direct result of physical improvements that have been made at various intersections in the area over the last 20 years such as adding through and turning lanes and upgrading all traffic signals to essentially increase intersection capacity by 10 percent, Brohard stated.

The Argonaut will cover the traffic study issue in its entirety once the county’s review is complete.

Brohard’s study can be viewed online